4.4 Angle Properties
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11 terms
Terms | Definitions |
|---|---|
 Linear Pair | is a pair of adjacent angles whose noncommon sides form a straight angles (are opposite rays) |
| Vertical Angles | are angles adjacent to the same angle and forming linear pairs with it |
| Complementary Angles | two angles that have a sum of 90° |
| Supplementary Angles | two angles that have a sum of 180° |
| Theorem 4.1 | all right angles are congruent |
| Theorem 4.2 | if two angles are adjacent and supplementary, then they form a linear pair |
| Theorem 4.3 | angles that form a linear pair are supplementary |
| Theorem 4.4 | if one angle of a linear pair is a right angle, then the other angle is also a right angle |
| Theorem 4.5 - Vertical Angle Theorem | vertical angles are congruent |
| Theorem 4.6 | congruent supplementary angles are right angles |
| Theorem 4.7- Angle Bisector Theorem | If ray AB bisects <CAD, then m< CAB=1/2m<CAD |
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